Electrostatically induced potential difference between conductive objects contained in a partially opened metal box

“…The consideration of this type has ever been mathematically studied or experimentally conducted [15][16][17][18][19][20][21][22]. Various experimental considerations of topic 3) have been completed, and the results show that electrical discharges of both positive and negative polarity in a partially opened metal box are generated while a charged body passes the front of a metal box.…”

Section: Introductionmentioning

confidence: 99%

Experimental consideration of electrostatically induced voltage generated by approach and isolation of charged body

Ichikawa

2015

IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society

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Electrical equipment within a metal box may malfunction by an electrostatically induced voltage. The induced voltage of the metal box is changed by the movement of a charged body, such as a charged human body. The induced voltage of the metal box generated by the approach and isolation of the charged body is experimentally studied in this work. In the experiments, the depth of a metal box is changed, and the result shows that the induced voltage of the metal box generated by the isolation of the charged body is higher than that generated by the approach of the body. The former induced voltage of the metal box becomes the voltage of approximately -400% of a latter induced voltage in this experimental condition. Electric charges of metal boxes are somewhat dependent of the depth of the boxes. These results will be useful to design electrical equipment capable of preventing equipment malfunction and failure.Keywords-electrical safety; electrostatically induced voltage; malfunction and failure; depth of metal box; moving charged body

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“…We can estimate the possible induced voltage on conductors that are contained in a grounded metal box. The estimation of the induced voltage can be possible by using empirical formulae [12,14], although the calculation of using electromagnetic simulation software is not as easy because very thin conductors or metal films are contained in the metal box. The calculation of the induced voltage becomes difficult with, for example, the finite element method in such a situation that a charged body moves near a metal case of electronic equipment.…”

Section: Introductionmentioning

confidence: 99%

“…In the experiments, the spark gap of 30 µm between two steel electrodes is used. The sparking voltages at the gap length of 30 µm are 498 V for the Paschen curve of equation (1) [12] and an average of 450 V for the 10 measurements. The measurements of the sparking voltage are performed by the use of a DC power supply with a maximum of 1 kV and the EMI locator.…”

Section: Introductionmentioning

confidence: 99%

“…An induced voltage is generated occasionally by the existence of a charged body, such as a charged human body [10] or a charged device [11]. The induced voltage changes by the distance between the metal box and the charged body [12]. Moreover, the induced voltage changes from the movement, for example, when the charged body approaches the metal box and the body moves away from the box [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Electrostatically induced voltage on conductive objects contained in metal box when charged body moves away from the box

Ichikawa

2016

IEEE Trans. Dielect. Electr. Insul.

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Electrostatically induced voltage generated on printed circuit boards in a grounded metal box occasionally causes a malfunction and failure of the electronic equipment. A person who walks into a room that has an air conditioner can be electrified up to -10 kV or more. However, a microelectronics device malfunctions by an occurrence of induced voltage of less than 10 V. In the present paper, the induced voltages on an ungrounded one of two conductors that are contained in the metal box are measured and calculated when a charged body moves away from a partially opened metal box. The induced voltages are measured by the use of a spark gap and an electromagnetic wave sensor and are compared with the results from an electrostatic voltmeter. The induced voltages are calculated, moreover, by the use of q=cv, with the capacitances and charges. The results show that the induced voltages of -42% of the voltages of the charged body are generated in the metal box when a charged body moves away from the metal box. The results will be helpful in considering preventive measures of the malfunction and failure of electronic equipment.Index Terms -Electrostatic induction, induced voltage, movement of charged body, metal box, malfunction and failure.

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Electrostatically induced potential difference between conductive objects contained in a partially opened metal box

Cited by 18 publications

References 8 publications

Change in electrostatically induced voltages of an ungrounded metal box without openings generated by a moving charged object

Change in electrostatically induced voltages of an ungrounded metal box without openings generated by a moving charged object

Experimental consideration of electrostatically induced voltage generated by approach and isolation of charged body

Electrostatically induced voltage on conductive objects contained in metal box when charged body moves away from the box

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